How, then, did philosophers come to consider reality to be unknowable and hidden behind or beyond appearances? They investigated all the possible presentations in different relationships, and put them all aside as appearances, and brooded on the thing-in-itself, shut out from all possible relationship, and declared it unknowable. Thing-in-itself means thing cut off from all possible relationships. To, put it in another way: thing-in-itself means thing deprived of its relation to its knower—that is to say, thing-knower-less. So that to declare thing-in-itself unknowable is as much as to declare thing-unknowable unknowable; there is no doubt about it, but what does it prove?
Deprive yourself of all the possible relationships, and see what you are. Suppose you are not a son to your parents, nor the husband to your wife, nor the father to your children, nor a relative to your kindred, nor a friend to your acquaintances, nor a teacher to your students, nor a citizen to your country, nor an individual member to your society, nor a creature to your God, then you get you-in-yourself. Now ask yourself what is you-in-yourself? You can never answer the question. It is unknowable, just because it is cut off from all knowable relations. Can you thus prove that you-in-yourself exist beyond or behind you?
In like manner our universe appears to us human beings as the phenomenal world or presentation. It might appear to other creatures of a different mental constitution as something else. We cannot ascertain how it might seem to Devas, to Asuras, to angels, and to the Almighty, if there be such beings. However different it might seem to these beings, it does not imply that the phenomenal world is unreal, nor that the realm of reality is unknowable.
'Water,' the Indian tradition has it, 'seems to man as a drink, as emerald to Devas, as bloody pus to Pretas, as houses to fishes.' Water is not a whit less real because of its seeming as houses to fishes, and fishes' houses are not less real because of its seeming as emerald to Devas. There is nothing that proves the unreality of it. It is a gross illusion to conceive reality as transcendental to appearances. Reality exists as appearances, and appearances are reality known to human beings. You cannot separate appearances from reality, and hold out the latter as the object of aspiration at the cost of the former. You must acknowledge that the so-called realm of reality which you aspire after, and which you seek for outside or behind the phenomenal universe, exists here on earth. Let Zen teachers tell you that "the world of birth and death is the realm of Nirvana"; "the earth is the pure land of Buddha."
16. The Four Alternatives and the Five Categories.
There are, according to Zen, the four classes of religious and philosophical views, technically called the Four Alternatives,[FN#201] of life and of the world. The first is 'the deprivation of subject and the non-deprivation of object' that is to say, the denial of subject, or mind, or Atman, or soul, and the non-denial of object, or matter, or things—a view which denies the reality of mind and asserts the existence of things. Such a view was held by a certain school of Hinayanism, called Sarvastivada, and still is held by some philosophers called materialists or naturalists. The second is the 'deprivation of object and the non-deprivation of subject'—that is to say, the denial of object, or matter, or things, and the non-denial of subject, or mind, or spirit-a view which denies the reality of material object, and asserts the existence of spirit or ideas. Such a view was held by the Dharmalaksana School of Mahayanism, and is still held by some philosophers called idealists. The third is 'the deprivation of both subject and object'—that is to say, the denial of both subject or spirit, and of object or matter-a view which denies the reality of both physical and mental phenomena, and asserts the existence of reality that transcends the phenomenal universe. Such a view was held by the Madhyamika School of Mahayanism, and is still held by some religionists and philosophers of the present day. The fourth is 'the non-deprivation of both subject and object'—that is to say, the non-denial of subject and object—a view which holds mind and body as one and the same reality. Mind, according to this view, is reality experienced inwardly by introspection, and body is the selfsame reality observed outwardly by senses. They are one reality and one life. There also exist other persons and other beings belonging to the same life and reality; consequently all things share in one reality, and life in common with each other. This reality or life is not transcendental to mind and body, or to spirit and matter, but is the unity of them. In other words, this phenomenal world of ours is the realm of reality. This view was held by the Avatamsaka School of Mahayanism, and is still held by Zenists. Thus Zen is not materialistic, nor idealistic, nor nihilistic, but realistic and monistic in its view of the world.
[FN#201] Shi-rya-ken in Japanese, the classification mostly made use of by masters of the Rin Zai School of Zen. For the details, see Ki-gai-kwan, by K. Watanabe.
There are some scholars that erroneously maintain that Zen is based on the doctrine of unreality of all things expounded by Kumarajiva and his followers. Ko-ben,[FN#202] known as Myo-ye Sho-nin, said 600 years ago: "Yang Shan (Kyo-zan) asked Wei Shan (I-san): 'What shall we do when hundreds, thousands, and millions of things beset us all at once?' 'The blue are not the yellow,' replied Wei Shan, 'the long are not the short. Everything is in its own place. It has no business with you.' Wei Shan was a great Zen master. He did not teach the unreality of all things. Who can say that Zen is nihilistic?"
[FN#202] A well-known scholar (1173-1232) of the Anatamsaka School of Mahayanism.
Besides the Four Alternatives, Zen uses the Five Categories[FN#203] in order to explain the relation between reality and phenomena. The first is 'Relativity in Absolute,' which means that the universe appears to be consisting in relativities, owing to our relative knowledge; but these relativities are based on absolute reality. The second is 'Absolute in Relativity,' which means Absolute Reality does not remain inactive, but manifests itself as relative phenomena. The third is 'Relativity out of Absolute,' which means Absolute Reality is all in all, and relative phenomena come out of it as its secondary and subordinate forms. The fourth is 'Absolute up to Relativity,' which means relative phenomena always play an important part on the stage of the world; it is through these phenomena that Absolute Reality comes to be understood. The fifth is the 'Union of both Absolute and Relativity,' which means Absolute Reality is not fundamental or essential to relative phenomena, nor relative phenomena subordinate or secondary to Absolute Reality—that is to say, they are one and the same cosmic life, Absolute Reality being that life experienced inwardly by intuition, while relative phenomena are the same life outwardly observed by senses. The first four Categories are taught to prepare the student's mind for the acceptance of the last one, which reveals the most profound truth.